diff -r 000000000000 -r 6474c204b198 browser/base/content/test/plugins/browser_bug797677.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/plugins/browser_bug797677.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,47 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ *  License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+var rootDir = getRootDirectory(gTestPath);
+const gHttpTestRoot = rootDir.replace("chrome://mochitests/content/", "http://127.0.0.1:8888/");
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+var gTestBrowser = null;
+var gConsoleErrors = 0;
+
+function test() {
+  waitForExplicitFinish();
+  var newTab = gBrowser.addTab();
+  gBrowser.selectedTab = newTab;
+  gTestBrowser = gBrowser.selectedBrowser;
+  gTestBrowser.addEventListener("PluginBindingAttached", pluginBindingAttached, true, true);
+  var consoleService = Cc["@mozilla.org/consoleservice;1"]
+                         .getService(Ci.nsIConsoleService);
+  var errorListener = {
+    observe: function(aMessage) {
+      if (aMessage.message.contains("NS_ERROR"))
+        gConsoleErrors++;
+    }
+  };
+  consoleService.registerListener(errorListener);
+  registerCleanupFunction(function() {
+    gTestBrowser.removeEventListener("PluginBindingAttached", pluginBindingAttached, true);
+    consoleService.unregisterListener(errorListener);
+    gBrowser.removeCurrentTab();
+    window.focus();
+  });
+  gTestBrowser.contentWindow.location = gHttpTestRoot + "plugin_bug797677.html";
+}
+
+function pluginBindingAttached() {
+  // Let browser-plugins.js handle the PluginNotFound event, then run the test
+  executeSoon(runTest);
+}
+
+function runTest() {
+  var doc = gTestBrowser.contentDocument;
+  var plugin = doc.getElementById("plugin");
+  ok(plugin, "plugin should be in the page");
+  is(gConsoleErrors, 0, "should have no console errors");
+  finish();
+}